High end Class D amps?

I currently don’t make, sell, or market any amplifiers and have no skin in the game either way. I do understand quite well amplifier topology though.

georgehifi, given your obviously thin educational knowledge w.r.t. amplifier topologies and again obviously without the practical experience to compensate for that knowledge gap, perhaps you should be giving pause to the fact that people with far more knowledge of amplifiers theoretically and practically are all telling you you are wrong. Not just one, but everyone.

The answer is simple: Gain knowledge instead of made up stories.

These are words of someone either in denial or in product protection mode.

George, as a simple tip: the ability to admit that you were wrong is a strength, not a weakness.


In my quote above I was simply stating a fact. My advice is to study how class D amps work (the theory is simple) and keep in mind that with any current output device (MOSFET or GaNFET; the difference between them these days is slight) the output impedance is going to be lower than any traditional solid state amp, often by a couple of orders of magnitude. As I mentioned earlier, the PuriFi modules (not made by me, so clearly not in 'product protection mode') have output impedances that are tricky to measure as they are about the same as a few inches of 12Ga wire.


So this is not about denial, its physics. When you have an amplifier with an output impedance that low, it pretty well makes no difference what phase angles the speaker has nor its impedance, since both are several **hundred** times more than the output impedance of the amp. This simply means that the amp will be able to make constant voltage into that load.

I currently don’t make, sell, or market any amplifiers and have no skin in the game either way.

You are delusional, I didn’t say you. Go back and read.

But then you are a 50’s kind of guy and you don’t hear too well anymore

George, as a simple tip: the ability to admit that you were wrong is a strength, not a weakness.

Ralph lay off protecting, you do the same with preamps.

Amazing.
@atmasphere ,
Dunning-Kruger effect seems to sum it up nicely.
Bob

You really don't need to trash George. He takes care of that himself.